you can feel it and you can feel that everybody else in the audience can feel it, and it's just an energy. >> reporter: five different concerts in two short hours, even one in a church. his favorite of the night, alabama's foss fluorescent. do you get that feeling? >> i have the feeling. they're good. good song. >> thank you so much. ♪ >> reporter: another band drawing big crowds this year, alt spp j. it's their first time here, all the way from england. the buzz that they just might be radiohead good brought out lines around the block. i'm going to be honest with you, our audience, probably the majority will be like, what? >> alt j. >> reporter: at 26, ryan is as old as south by southwest is. over time, the festival has grown to include big headliners, too, like my teen idol, rick springfield. i may or may not have had posters of you on my wall. >> ha! >> reporter: we've been talking to a lot of bands who are little known, up and coming, trying to break through. >> that's cool. >> reporter: and it must be so different from when you did it. >> the music industry's changed so drastically